WO2010000166A1 - Dispositif d'ajustement de temps de retard et procédé correspondant - Google Patents

Dispositif d'ajustement de temps de retard et procédé correspondant Download PDF

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Publication number
WO2010000166A1
WO2010000166A1 PCT/CN2009/072038 CN2009072038W WO2010000166A1 WO 2010000166 A1 WO2010000166 A1 WO 2010000166A1 CN 2009072038 W CN2009072038 W CN 2009072038W WO 2010000166 A1 WO2010000166 A1 WO 2010000166A1
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WO
WIPO (PCT)
Prior art keywords
signal
delay
digital
inserter
filter
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Application number
PCT/CN2009/072038
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English (en)
Chinese (zh)
Inventor
陶智慧
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP09771936.3A priority Critical patent/EP2317672B1/fr
Publication of WO2010000166A1 publication Critical patent/WO2010000166A1/fr
Priority to US12/982,609 priority patent/US8594513B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/58—Compensation for non-linear transmitter output

Definitions

  • This invention relates to signal processing, and more particularly to a delay adjustment technique. Background of the invention
  • the transmission of signals in the optical fiber is affected by the dispersion.
  • the so-called dispersion is the difference between the different frequency components of the signal transmitted in the optical fiber or the transmission speed of the various modes of the signal.
  • the main influence of the dispersion on the optical transmission is The inter-code interference is generated between the data pulses.
  • the damage caused by the dispersion to the system performance is often not negligible.
  • the optical fiber transmission system with a transmission rate above lOGbit/s needs the dispersion compensation technology to ensure the transmission function of the system.
  • the electric field dispersion compensation especially at the origin, performs the electric field dispersion pre-compensation (EPD), which has long-distance dispersion compensation capability.
  • EPD electric field dispersion pre-compensation
  • the digital signal processor sends two signals.
  • the two signals are respectively multiplexed by a multiplexer, converted into analog signals by a digital-to-analog converter, amplified by an amplifier, and then passed through a modulator.
  • the I and Q signals are modulated onto the optical signal emitted by the light source for transmission.
  • FIG. 2 Another EPD system in the prior art is shown in FIG. 2.
  • the delay difference between the two signals of I and Q is changed by connecting the phase shifter in front of the multiplexer and changing the phase by the phase shifter.
  • a first signal inserter configured to receive the first path signal, and insert a scramble signal in the first path signal
  • a first delay device configured to delay a signal processed by the first signal inserter
  • a first power splitter configured to extract a part of the signal from the delayed signal of the first delay device
  • a first filter configured to filter a signal extracted by the first power splitter, and output a scrambled signal inserted by the first signal inserter
  • a second power splitter configured to extract a part of the signal from the signal output by the second signal inserter
  • a second filter configured to filter a signal extracted by the second power splitter, and output a scrambled signal inserted by the second signal inserter
  • a first signal inserter configured to receive the first digital signal, and insert a scramble signal into the first digital signal
  • a first delay device configured to delay the signal processed by the first signal inserter Time
  • a first power splitter configured to extract a part of the signal from the delayed signal of the first delay device
  • a first filter configured to filter a signal extracted by the first power splitter, and output a scrambled signal inserted by the first signal inserter
  • a second delay device configured to delay an analog signal processed by the second signal inserter
  • a second power divider configured to extract a part of the signal from the delayed signal of the second delay device
  • a second filter configured to filter a signal extracted by the second power splitter, and output a scrambled signal inserted by the second signal inserter
  • a first signal inserter configured to receive the first digital signal, and insert a scramble signal into the first digital signal
  • a first delay device configured to delay the signal processed by the first signal inserter Time
  • a first power splitter configured to extract a part of the signal from the delayed signal of the first delay device
  • a first filter configured to filter a signal extracted by the first power splitter, and output a scrambled signal inserted by the first signal inserter
  • a second signal inserter configured to receive the second digital signal, and insert a scrambled signal into the second digital signal, the inserted scrambled signal being the same as the scrambled signal inserted by the first signal inserter;
  • a controller configured to receive a signal sent by the first filter and the second filter, detect a delay difference between the two signals according to the difference between the two signals, and change a delay of the two signals by adjusting the first delay device difference.
  • a delay adjustment device for adjusting a delay difference during transmission of a digital signal and a second digital signal; a light source for generating an optical signal; a modulator, configured to adjust two signals that have been adjusted by the delay adjustment device to the optical signal, and send the signal; wherein the delay adjustment device includes:
  • a first signal inserter configured to receive the first digital signal, and insert a scramble signal into the first digital signal
  • a first analog to digital converter configured to process the first signal inserter Converting the signal into an analog signal
  • a first delay device configured to delay an analog signal converted by the first analog to digital converter
  • a first power divider connected to the modulator and the first delayer, for extracting a part of a signal from the delayed signal of the first delayer
  • a first filter configured to filter a signal extracted by the first power splitter, and output a scrambled signal inserted by the first signal inserter
  • a second signal inserter configured to receive the second digital signal, and insert a scrambled signal into the second digital signal, the inserted scrambled signal is the same as the scrambled signal inserted by the first signal inserter ;
  • a second analog-to-digital converter configured to convert the signal processed by the second signal inserter into an analog signal
  • a second delay device configured to delay the analog signal converted by the first analog to digital converter
  • a second power divider connected to the modulator and the second delay device, for extracting a part of the signal from the delayed signal of the first delay device
  • a second filter configured to filter a signal extracted by the second power splitter, and output a scrambled signal inserted by the second signal inserter
  • a controller configured to receive the signal after the output of the first filter and the second filter, detect a delay difference of the two signals according to the difference between the two signals, and adjust the first delay device and/or the second delay The timer changes the delay difference of the two signals.
  • a digital signal processor for transmitting a first digital signal and a second digital signal
  • a delay adjustment device for adjusting a delay difference during transmission of a digital signal and a second digital signal; a light source for generating an optical signal;
  • a modulator configured to adjust two signals that have been adjusted by the delay adjustment device to the optical signal, and send the signal; wherein the delay adjustment device includes:
  • a first signal inserter configured to receive the first digital signal, and insert a scramble signal into the first digital signal
  • a first analog to digital converter configured to process the first signal inserter Converting the signal into an analog signal
  • a first delay device configured to delay an analog signal converted by the first analog to digital converter
  • a first power divider connected to the modulator and the first delayer, for extracting a part of a signal from the delayed signal of the first delayer
  • a second signal inserter configured to receive the second digital signal, and insert a scrambled signal into the second digital signal, the inserted scrambled signal is the same as the scrambled signal inserted by the first signal inserter ;
  • a second analog-to-digital converter configured to convert the signal processed by the second signal inserter into an analog signal
  • a second power divider connected to the modulator and the second analog to digital converter, for extracting a part of the signal from the signal converted by the second analog to digital converter
  • a second filter configured to filter a signal extracted by the second power splitter, and output a scrambled signal inserted by the second signal inserter
  • a controller configured to receive the signal after the output of the first filter and the second filter, detect a delay difference of the two signals according to the difference between the two signals, and change the time of the two signals by adjusting the first delay device Delay.
  • a digital signal processor for transmitting a first digital signal and a second digital signal
  • a delay adjustment device for adjusting a delay difference during transmission of a digital signal and a second digital signal; a light source for generating an optical signal;
  • a modulator configured to adjust two signals that have been adjusted by the delay adjustment device to the optical signal, and send the signal; wherein the delay adjustment device includes:
  • a first signal inserter configured to receive the first digital signal, and insert a scramble signal into the first digital signal
  • a first delay device configured to delay the signal processed by the first signal inserter Time
  • a first analog-to-digital converter configured to convert the signal processed by the first delayer into an analog signal
  • a first power divider connected to the modulator and the first analog to digital converter, for extracting a part of a signal from a signal converted by the first analog to digital converter
  • a first filter configured to filter a signal extracted by the first power splitter, and output a scrambled signal inserted by the first signal inserter
  • a second delay device configured to delay a signal processed by the second signal inserter
  • a second analog-to-digital converter configured to convert the signal processed by the second delay device into an analog signal
  • a second power divider coupled to the modulator and the second analog to digital converter, for extracting a portion of the signal from the signal converted by the second analog to digital converter
  • a controller configured to receive the signal after the output of the first filter and the second filter, detect a delay difference of the two signals according to the difference between the two signals, and adjust the first delay device and/or the second delay The timer changes the delay difference of the two signals.
  • a digital signal processor for transmitting a first digital signal and a second digital signal
  • a delay adjustment device for adjusting a delay difference during transmission of a digital signal and a second digital signal; a light source for generating an optical signal;
  • a modulator configured to adjust two signals that have been adjusted by the delay adjustment device to the optical signal, and send the signal;
  • the delay adjustment device includes: a first signal inserter, configured to receive the first digital signal, and insert a scramble signal into the first digital signal; a first delay device, configured to delay the signal processed by the first signal inserter Time;
  • a first analog-to-digital converter configured to convert the signal processed by the first delayer into an analog signal
  • a first power divider connected to the modulator and the first analog to digital converter, for extracting a part of a signal from a signal converted by the first analog to digital converter
  • a first filter configured to filter a signal extracted by the first power splitter, and output a scrambled signal inserted by the first signal inserter
  • a second signal inserter configured to receive the second digital signal, and insert a scrambled signal into the second digital signal, the inserted scrambled signal being the same as the scrambled signal inserted by the first signal inserter;
  • a second analog-to-digital converter configured to convert the signal processed by the second delay device into an analog signal
  • a second power divider coupled to the modulator and the second analog to digital converter, for extracting a portion of the signal from the signal converted by the second analog to digital converter
  • a controller configured to receive the signal after the output of the first filter and the second filter, detect a delay difference of the two signals according to the difference between the two signals, and change the time of the two signals by adjusting the first delay device Delay.
  • the delay difference of the two signals is detected according to the difference between the two channels of the scrambled signals, and the delay difference of the two signals is adjusted by delaying at least one of the two signals.
  • FIG. 1 is a schematic diagram of a prior art electrical domain dispersion pre-compensation system
  • FIG. 2 is a schematic diagram of another electrical domain dispersion pre-compensation system of the prior art
  • FIG. 3 is a schematic diagram of a delay adjustment device according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of another delay adjustment device according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a time delay adjustment apparatus according to Embodiment 2 of the present invention.
  • FIG. 6 is a flowchart of a delay adjustment method according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic diagram of an optical transmitting apparatus according to Embodiment 4 of the present invention. Mode for carrying out the invention
  • the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
  • this embodiment is a delay difference adjusting device, which includes a controller, and two sets of signal inserters, delays, power dividers, and filters connected in sequence.
  • a first signal inserter configured to receive the first path signal, and insert a scrambled signal into the signal
  • the scrambled signal may be, for example, a single frequency disturbance A ⁇ ir ⁇ t), or multiple single frequency disturbances A 1 sin ( o 1 t)+A 2 sin( o 2 t)+ ⁇ +A ;j sin( o ;j t), where n is a natural number, ⁇ resort, ⁇ “ is a rational number
  • the first delay is used for The signal processed by the first signal inserter is delayed; the first power divider is configured to extract a part of the signal (for example, 5%) from the delayed signal of the first delay device; And filtering the signal extracted by the first power splitter, and outputting the scrambled signal inserted by the first signal inserter.
  • a second signal inserter configured to receive the second path signal, and insert a scrambled signal into the signal, the inserted scrambled signal is the same as the scrambled signal inserted by the first signal inserter;
  • the second delay device The second power splitter is configured to extract a part of the signal (for example, 5%) from the delayed signal of the second delay device;
  • a second filter configured to filter a signal extracted by the second power splitter, and output a scrambled signal inserted by the second signal inserter.
  • the controller is configured to be connected to the first delay device, the second delay device, the first filter, and the second filter. Receiving a signal output by the first filter and the second filter, detecting a delay difference by calculating a magnitude of a difference between the two signals, and passing the first delay and/or the second delay The delay is used to control the delay difference between the two signals.
  • the controller may be connected to the first signal inserter and the second signal inserter to control a scramble signal corresponding to the first signal inserter and the second signal inserter.
  • the signals received by the first signal inserter and the second signal inserter are E t) and E 2 (t), respectively, and the scrambled signal is AjSinCo jt), and the second signal is generated in the transmission process relative to the first signal.
  • the delay is ⁇ , then the two signals after scrambling are:
  • the filter has more choices. It can select the signal of a certain frequency for filtering, filter the signal of a specific frequency through the filter, and the formula (3) becomes
  • a first digital-to-analog converter and a second digital-to-analog converter may be added.
  • the first digital-to-analog converter is disposed between the first signal inserter and the first delay device, or between the first delay device and the first power splitter, And performing analog-to-digital conversion on the signal before the first signal inserter sends a signal to the first delay device, or before the first delay device sends a signal to the first power divider signal;
  • a second digital-to-analog converter disposed between the second signal inserter and the second delay device, or between the second delay device and the second power divider, The signal is analog-to-digital converted before the second signal inserter sends a signal to the second delay, or before the second delay sends a signal to the second splitter signal.
  • FIG. 4 shows another delay adjustment device of the first embodiment, that is, a first digital-to-analog converter is disposed between the first signal inserter and the first delay device, and second A time delay adjusting device is provided in the case where the digital to analog converter is provided between the second signal inserter and the second delay device.
  • the case where the first digital-to-analog converter and the second digital-to-analog converter are disposed at other positions is not shown in FIG.
  • the delay adjustment can be performed online, and the operation delay is faster, and the delay difference is monitored and adjusted in real time; when multiple single-frequency disturbances are used as the insertion signal,
  • the frequency is optional and the reliability is enhanced.
  • the delay of the first signal relative to the second signal is ⁇ , and the first delay will cause the delay ⁇ ⁇ , then the total delay is ⁇ + ⁇ ⁇ .
  • the scrambled signal is a single-frequency disturbance A i sin ( ⁇ lt ), and the delay of the second signal relative to the first signal during transmission is ⁇ . Then the two signals after adding the scrambled signal are:
  • the filter has more choices. It can select the signal of a certain frequency for filtering, filter the signal of a specific frequency through the filter, and the formula (3) becomes
  • the delay adjustment can be performed online, and the operation delay is faster, and the delay difference is monitored and adjusted in real time; when multiple single-frequency disturbances are used as the insertion signal,
  • the frequency is optional and the reliability is enhanced.
  • the embodiment relates to an optical transmitting device, such as an electrical domain dispersion compensation device, where the device includes: a digital signal processor, configured to send a first digital signal and a second digital signal;
  • a delay adjustment device for adjusting a delay difference during transmission of the first digital signal and the second digital signal; a light source for generating the optical signal; and a modulator for passing the delay adjustment device Adjusting two signals are adjusted to the optical signal and sent out;
  • the delay adjustment apparatus includes: a first signal inserter, configured to receive the first digital signal, and insert a scrambled signal into the first digital signal; a first analog to digital converter, The signal processed by the first signal inserter is converted into an analog signal; a first delay device is configured to delay the analog signal converted by the first analog-to-digital converter; the first power splitter, The modulator and the first delayer are connected to extract a part of the signal from the delayed signal of the first delayer; the first filter is configured to extract the first splitter The signal is filtered to output a scrambled signal inserted by the first signal inserter; a second signal inserter is configured to receive the second digital signal, and insert a scrambled signal into the second digital signal, and insert the signal The scrambled signal is the same as the first signal inserter inserting the scrambled signal; the second analog-to-digital converter is configured to convert the signal processed by the second signal inserter into an analog signal; a second delay device, Used for the said The analog signal converted by the second
  • a controller configured to receive the signal after the output of the first filter and the second filter, determine a delay difference of the two signals according to the difference between the two signals, and adjust the first delay device and/or the second delay The timer changes the delay difference of the two signals.
  • the electrical domain dispersion compensation device may no longer require an additional amplifier.
  • the first signal inserter and the second signal inserter are other components such as the bias T and do not have sufficient amplification function, an amplifier may be separately added between the two outputs of the delay adjustment device and the regulator.
  • the delay adjustment of the optical transmitting device can be performed online, and the operation delay is faster, and the delay difference is monitored and adjusted in real time; when multiple single-frequency interference actions are used as the insertion signal When, because there are multiple frequencies available Selected, enhanced reliability.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention porte sur un procédé d'ajustement de temps de retard, qui comprend l'addition des mêmes signaux embrouillés dans deux signaux reçus respectivement, puis l'extraction des signaux embrouillés additionnés, la mesure des inégalités de retard entre les deux signaux reçus sur la base d'une différence entre les signaux embrouillés extraits, et l'ajustement de l'inégalité de retard entre les deux signaux reçus par retardement de l'un des deux signaux reçus ou des deux. En outre, l'invention porte également sur un dispositif d'ajustement de temps de retard et sur un dispositif de transmission optique. Un ajustement en ligne de temps de retard peut être réalisé par application de la présente invention. Une surveillance et un ajustement en temps réel d'inégalité de retard peuvent également être réalisés par application de la présente invention.
PCT/CN2009/072038 2008-06-30 2009-05-27 Dispositif d'ajustement de temps de retard et procédé correspondant WO2010000166A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09771936.3A EP2317672B1 (fr) 2008-06-30 2009-05-27 Dispositif d'ajustement de temps de retard et procédé correspondant
US12/982,609 US8594513B2 (en) 2008-06-30 2010-12-30 Time delay adjustment device and method

Applications Claiming Priority (2)

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CN2008100681854A CN101621337B (zh) 2008-06-30 2008-06-30 一种时延调节装置与方法
CN200810068185.4 2008-06-30

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WO2010000166A1 true WO2010000166A1 (fr) 2010-01-07

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EP (1) EP2317672B1 (fr)
CN (1) CN101621337B (fr)
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WO2010103334A1 (fr) 2009-03-12 2010-09-16 Prosidion Limited Composés pour le traitement de troubles métaboliques
WO2010103335A1 (fr) 2009-03-12 2010-09-16 Prosidion Limited Composés pour le traitement de troubles métaboliques
US8594513B2 (en) 2008-06-30 2013-11-26 Huawei Technologies Co., Ltd. Time delay adjustment device and method

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WO2010103333A1 (fr) 2009-03-12 2010-09-16 Prosidion Limited Composés pour le traitement de troubles métaboliques
WO2010103334A1 (fr) 2009-03-12 2010-09-16 Prosidion Limited Composés pour le traitement de troubles métaboliques
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CN101621337B (zh) 2013-08-07
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US20110097091A1 (en) 2011-04-28
US8594513B2 (en) 2013-11-26
CN101621337A (zh) 2010-01-06
EP2317672B1 (fr) 2013-05-15

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